125 gr Abonds in 300 WSM?

[DaveB]

Looking for suggestions and your experience:

Once again I am trying to get my 300 WSM to shoot 125gr Nosler Accubonds. Previous attempts are not successful.
Rifle is
T/C Venture
5R rifling
1:10 twist
21.75 inch barrel (free floating)
Chamber is tight; not much room to play with jump
Federal brass
Federal 215M primers
I have no Vita powders
I have most of the powder Hodgdon uses
I have most of the powder Nosler uses
Compressed loads are acceptable

What I see accuracy-wise is a FPS node of greater than 3300 through 3450
Would really like to see more velocity but right now need accuracy.

 

[jlanecr500]

.020" off the lands preferably, what is your COAL ? If that length won't fit in the mag, give me the max COAL that will fit in the mag.

What is the cartridge water fill weight minus cartridge empty weight.

With these 2 variables and the barrel length you posted, I can run it in Quickload and target a barrel time from my node list.

 

[MUP]

I had a friend who loaded 110 gr bullets of some make and model for his 300 WinMag, lasers.

 

[TiminTN]

1st thing, drop the magnum primers. Standard large rifle will tighten up groups. Powder speed will seem fast, but Varget, IMR4895, AA4350, IMR4064, H380 is where I'd look.

 

[DaveB]

Federal 215M primers
Fed 210 primer
79 grains water
case 229 gr dry
COAL is 2.870 (absolute max). I am using 2.860
I have Varget, IMR4895, AA4350, IMR4064, H380 is where I'd look.

 

[TiminTN]

I'd personally give IMR4064, a chance first. Only going off comparing 125 vs 150 gr load data off Nosler chart. No first hand experience, other than standard primer vs magnum.

 

[jlanecr500]

I ran the following loads. There is a node at ~1.022ms. The next node is ~.894ms but is unobtainable with any powder as you will exceed pressure limits and case capacity half way there.

I would start .5gr under the calculated load and step up in .2gr increments til the group closed and reopened.

IMR4064 63.0gr 58581kpsi 3356fps

IMR4895 64.2gr 59117kpsi 3428fps

H380. 67.2gr 59624kpsi 3403fps